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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 0 |
| 9 | 0 |
| 10 | 0 |
| 11 | 0 |
| 12 | 0 |
| 13 | 0 |
| 14 | 0 |
| 15 | 0 |
| 16 | 0 |
| 17 | 0 |
| 18 | 0 |
| 19 | 0 |
| 20 | 0 |
| 21 | 0 |
| 22 | 0 |
| 23 | 0 |
| 24 | 0 |
| 25 | 0 |
| 26 | 0 |
| 27 | 0 |
| 28 | 0 |
| 29 | 0 |
| 30 | 0 |
| 31 | 1 |
| 32 | 5 |
| 33 | 14 |
| 34 | 42 |
| 35 | 105 |
| 36 | 273 |
| 37 | 686 |
| 38 | 1705 |
| 39 | 4253 |
| 40 | 10600 |
| 41 | 26491 |
| 42 | 66175 |
| 43 | 165478 |
| 44 | 412317 |
| 45 | 1024459 |
| 46 | 2531097 |
| 47 | 6217973 |
| 48 | 15168005 |
| 49 | 36737953 |
| 50 | 88296456 |
| 51 | 210584837 |
| 52 | 498290619 |
[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,1,5,14,42,105,273,686,1705,4253,10600, 26491,66175,165478,412317,1024459,2531097,6217973, 15168005,36737953,88296456,210584837,498290619] |